In this study the psychometric properties of the SDQ list (The Strengths and Difficulties Questionnaire) were assessed. The SDQ list was developed by Robert Goodman (1997) and it has been translated to over 40 languages, including Icelandic (Agnes Huld Hrafnsdóttir, 2005-2006). Since the original Icelandic translation from 2001 hasn‘t provided clear enough factor structure the translation was improved in order to rectify that. The new version was evaluated in a sample of 135 Icelandic children in Garðabær, 6 to 10 years of age. Parents were asked to answer the questionnaire. The SDQ list assesses behavior, emotional well being and social skills of children from 4 to 16 years old (Goodman, 2001). Exploratory factor analysis revealed five factors. These factors are hyperactivity, conduct problems, emotional problems, difficulties in peer relationships and social skills. This solution is comparable with previous studies in Iceland and in other countries (Agnes Huld Hrafnsdóttir, 2005-2006; Smedje, Broman, Hetta og von Knorring, 1999; Van Widenfelt, Goedhart, Treffers og Goodman, 2003; Koskelainen, Sourander og Kaljonen, 2001; Woerner, Becker og Rothenberger, 2004). Internal consistency for each factor was unsatisfactory for every scale except for the hyperactivity scale (α = 0,741). The factor structure is in coherence with previous Icelandic studies (Agnes Huld Hrafnsdóttir, 2005; Harpa Hrund Berndsen, 2005; Anika Ýr Böðvarsdóttir, 2006; Auður Magnúsdóttir og Berglind Sveinbjörnsdóttir, 2004). The study needs to be repeated with a larger sample. The SDQ list has mostly been assessed in the capital area of Iceland but it needs to be done in every section of the country in order to improve generality.